3D Simulation of Electric Arcing and Pressure increase in an Automotive HVDC Relay During a Short Circuit Situation

Publikation: Beiträge in SammelwerkenAufsätze in KonferenzbändenForschungbegutachtet


A short circuit situation in an electric vehicle can lead to several undesirable occurrences. One of such is the formation of high temperature electric arcs between the contacts of the high voltage direct current (HVDC) relays in the circuit. These arcs significantly vaporize the contacts within a few milliseconds. As a result, the pressure of the gas within the relay chamber significantly increases. Depending on the magnitude of the short circuit current, the pressure increase may lead to an explosion of the relay. To understand and quantify the pressure increase, a Panasonic AEV14012 relay is investigated. A short circuit experiment is conducted on the relay. The test results are compared with a numerical model established in COMSOL to simulate the electric arcing process. The temperature of the arcs is used to estimate the resulting vaporization. The simulation results show the arcing process and the resulting pressure increase within the relay chamber.
TitelELECTRICAL CONTACTS 2020 - Proceedings of the 66th IEEE Holm Conference on Electrical Contacts and Intensive Course, HLM 2020
Anzahl der Seiten7
ErscheinungsortSan Antonio
VerlagIEEE - Institute of Electrical and Electronics Engineers Inc.
ISBN (Print)978-0-7381-2360-8
ISBN (elektronisch)978-0-7381-2359-2, 978-0-7381-2358-5
PublikationsstatusErschienen - 30.09.2020
Veranstaltung66th IEEE Holm Conference on Electrical Contacts - IEEE Holm 2020 - San Antonio, TX, USA / Vereinigte Staaten
Dauer: 30.09.202007.10.2020
Konferenznummer: 66